CN104722367B - A kind of medium stirred type wet grinding dispersal device - Google Patents
A kind of medium stirred type wet grinding dispersal device Download PDFInfo
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- CN104722367B CN104722367B CN201310707221.8A CN201310707221A CN104722367B CN 104722367 B CN104722367 B CN 104722367B CN 201310707221 A CN201310707221 A CN 201310707221A CN 104722367 B CN104722367 B CN 104722367B
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- Prior art keywords
- grinding
- chamber
- guide ring
- type wet
- dispersal device
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
- B02C17/163—Stirring means
Abstract
The invention provides a kind of medium stirred type wet grinding dispersal device, including grinding chamber, dielectric separator, guide ring, dispersion impeller and power transmission shaft, the grinding chamber is the airtight cavity of cylinder or cone, the top of the grinding chamber is provided with disengagement chamber, the dielectric separator is in the disengagement chamber, wherein, the guide ring is located at grinding chamber middle part and is fixedly connected with the power transmission shaft, the guide ring is rotated by the drive shaft, and the periphery of the guide ring is provided with a plurality of blade；The dispersion impeller is located between the guide ring and the bottom of the grinding chamber, the center that the power transmission shaft passes through the dispersion impeller, the dispersion impeller includes at least two leaf dishes be arrangeding in parallel, the leaf dish is provided with plurality of passages, and each two leaf dish is fixed by the support column that multiple cross sections are circular or ellipse.Above-mentioned medium stirred type wet grinding dispersal device causes that abrasive media and material high-speed disperse, and reduces circular grinding number of times, improves grinding efficiency.
Description
Technical field
The present invention relates to a kind of medium stirred type apparatus for grinding and dispersing, specifically, it is related to a kind of medium stirred type wet method
Apparatus for grinding and dispersing.
Background technology
Medium stirred type wet grinding decentralized processing mode, refers to that material and abrasive media are ground into scattered process
In, the solid particle that will be contained in material by abrasive media carries out Crushing of Ultrafine, the dispersion that formation is made up of more tiny particulate
The processing mode of liquid.At present, this kind of decentralized processing mode has fully been applied in ink, pigment, coating, ceramics, metal, inorganic
In the fields such as thing, battery polar material, ferrite, carbon dust, graphite powder and cosmetics.
Utility application of the previously proposed mistake of the applicant on medium stirred type wet grinding dispersal device,
In the cross-sectional view of medium stirred type wet grinding dispersal device as shown in Figure 1, medium stirred type wet grinding point
It is in bulk put 100 include grinding chamber 5, dispersion impeller 11, guide ring 8, dielectric separator 3, top grating 15 and lower grid plate 16.Dispersion leaf
Wheel 11 is located at the bottom of grinding chamber 5, and the surface of guide ring 8 is smooth and is fixed on the upper cover plate 6 of grinding chamber 5 by fixed column 7, guide ring
8 outers for being located at lower grid plate 16, its top is correspondingly provided with top grating 15；Upper cover plate 6 is provided with charging aperture 1, and the bottom of grinding chamber 5 sets
There is outlet 10；Dielectric separator 3 is located in the disengagement chamber 4 of the top of grinding chamber 5, and choked flow is provided between disengagement chamber 4 and grinding chamber 5
Plate 12, the inwall of disengagement chamber 4 is provided with stopper 13, and the top of disengagement chamber 4 is provided with axle envelope 2, and the lower section of grinding chamber 5 is provided with lower axle envelope
9, and the top of disengagement chamber 4 is additionally provided with discharge gate 14.
Applicant is had found due to the set-up mode of above-mentioned guide ring, when material and grinding medium in continuous R＆D process
When matter passes through from guide ring, the characteristics of motion of material and abrasive media in grinding chamber can be caused, may be such that material
Collision and abrasive media between is not fierce enough.In addition, the set-up mode of above-mentioned dispersion impeller there is also some shortcomings.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of medium stirred type wet grinding dispersal device, can avoid
Abrasive media and the material characteristics of motion in grinding chamber so that the two can occur intensely to collide；Furthermore it is possible to be grinding
Medium and material provide bigger active force and more complicated motion so that the two can disperse at a high speed, reduce circular grinding
Number, so as to improve grinding efficiency.
To achieve the above object, the present invention provides a kind of medium stirred type wet grinding dispersal device, including grinding chamber, Jie
Matter separator, guide ring, dispersion impeller and power transmission shaft, the grinding chamber are the airtight cavity of cylinder or cone, described to grind
The top of mill chamber is provided with disengagement chamber, and the dielectric separator is located in the disengagement chamber, wherein, the guide ring is located at described grinding
It is fixedly connected in the middle part of mill chamber and with the power transmission shaft, the guide ring is rotated by the power transmission shaft, outside the guide ring
It is provided with a plurality of blade week；The dispersion impeller is located between the guide ring and the bottom of the grinding chamber, and the power transmission shaft leads to
The center of the dispersion impeller is crossed, the dispersion impeller includes at least two leaf dishes be arrangeding in parallel, and the leaf dish is provided with many
Bar passage, each two leaf dish is fixed by the support column that multiple cross sections are circular or ellipse.
Further, the plurality of passages in the leaf dish is symmetric.
Further, the passage in the leaf dish is 4.
Further, the periphery of the guide ring is provided with the blade or spiral helicine blade of a plurality of turbine-like.
Further, the support column is cylinder.
Further, the dielectric separator includes the discharging opening for discharging the material not comprising abrasive media.
Further, the bottom of the grinding chamber is provided with lower axle envelope, and the top of the disengagement chamber is provided with axle envelope.
Further, the top of the grinding chamber is provided with upper cover plate, and the upper cover plate is provided with charging aperture, the grinding chamber
Bottom be provided with outlet.
Further, the dielectric separator is including centrifugation formula dielectric separator, between screen mesh type separator and ring-type
Spacer-type separator.
Further, the dielectric separator includes without motor-driven static separation device and has the dynamic of individual motor driving
State separator.
Knowable to the description above and practice, the medium stirred type wet grinding dispersal device that the present invention is provided, grinding medium
When matter and material are by the guide ring that is rotated by power transmission shaft, randomly can fall in the different zones of dispersion impeller, so that
No longer it is the motion for doing regularization when material and abrasive media is passed through guide ring, helps to increase touching for material and abrasive media
The severity of number of times and collision is hit, such that it is able to improve grinding efficiency, circular grinding number of times is reduced.And, dispersion impeller
Fixed by the support column that multiple cross sections are circular or ellipse between each leaf dish, relative to the knot of existing dispersion impeller
Structure, the cambered surface of support column has bigger active force for material and abrasive media, can be easier to promote the quick of the two
Dispersion.In addition, the cambered surface of support column may be such that material and abrasive media have diversity, such energy with the impingement position of support column
Enough drive abrasive media and material to make more complicated motion, the collision of fierceness is helped to create, such that it is able to improve grinding efficiency.
Brief description of the drawings
By description below in conjunction with the accompanying drawings to embodiment, features described above of the invention and technological merit will become more
Understand and be readily appreciated that.In the accompanying drawings,
Fig. 1 is a kind of cross-sectional view of existing medium stirred type wet grinding dispersal device；
Fig. 2 is the cross-sectional view of the medium stirred type wet grinding dispersal device of one embodiment of the invention；
Fig. 3 is the structural representation of the dispersion impeller of the medium stirred type wet grinding dispersal device in embodiment illustrated in fig. 2
Figure.
Reference
100 medium stirred type wet grinding dispersal devices;
1 charging aperture；Axle envelope on 2；3 dielectric separators；4 disengagement chambers；
5 grinding chambers；6 upper cover plates；7 fixed columns；8 guide rings；
9 times axle envelopes；10 outlets；11 dispersion impellers；12 spoilers；
13 stoppers；14 discharging openings；15 top gratings；16 lower grid plates；
100 ' medium stirred type wet grinding dispersal devices;
7 ' power transmission shafts；8 ' guide rings；11 ' dispersion impellers；
111 ' leaf dishes；112 ' passages；113 ' cylinders；114 ' through holes.
Specific embodiment
It is below in conjunction with the accompanying drawings and specific real to enable the above objects, features and advantages of the present invention more obvious understandable
The present invention is further detailed explanation to apply mode.
Fig. 2 is the cross-sectional view of the medium stirred type wet grinding dispersal device of one embodiment of the invention.Fig. 3 is
The structural representation of the dispersion impeller of the medium stirred type wet grinding dispersal device in embodiment illustrated in fig. 2.
As shown in Figures 2 and 3, the medium stirred type wet grinding dispersal device 100 ' in the present embodiment include grinding chamber 5,
Dielectric separator 3, power transmission shaft 7 ', guide ring 8 ' and dispersion impeller 11 '.
Grinding chamber 5 is cylinder or the airtight cavity of cone, the abrasive media comprising spherical shape or other shapes in it.
The top of grinding chamber 5 is provided with disengagement chamber 4, and dielectric separator 3 is in disengagement chamber 4.
The top of grinding chamber 5 also includes upper cover plate 6, and upper cover plate 6 is provided with charging aperture 1, and material is ground by the entrance of charging aperture 1
In mill chamber 5.The bottom of grinding chamber 5 is provided with outlet 10, for discharging abrasive media and salvage stores.
The bottom inside wall of grinding chamber 5 of the lower section of lower grid plate 16 has the gradient, and the gradient contributes to material and abrasive media to receive
To rapid increase during climbing power.The periphery of top grating 15 has the gradient, and the gradient helps to guide material and abrasive media
To the top of guide ring 8 '.
Guide ring 8 ' is located at the middle part of grinding chamber 5, and can led positioned at the outer of lower grid plate 16, material and abrasive media
Flow under the guide functions of ring 8 ', the redistribution in grinding chamber 5.
Wherein, the periphery of guide ring 8 ' can be provided with the blade of a plurality of turbine-like, can also be provided with a plurality of spiral helicine blade, should
A little blades can be provided in groove-like structure on guide ring 8 ' etc..
Guide ring 8 with smooth flat of the prior art, the surface of guide ring 8 and edge are thrown away by material and abrasive media
The tangential direction motion of guide ring 8, guide ring 8 ' in the present embodiment is provided with a plurality of turbine-like or spiral helicine blade
Afterwards, the complexity of material and the abrasive media motion path in grinding chamber 5 can be increased, the collision of fierceness is helped to create.Example
Such as, spiral helicine blade can provide upward spiral helicine movement locus for material and abrasive media, when material and grinding medium
When matter is thrown off guide ring 8 ', its direction of motion can be thrown to the top of guide ring 8 ' or other any directions.
Power transmission shaft 7 ' and guide ring 8 ' are fixed, and power transmission shaft 7 ' can drive guide ring 8 ' to rotate, wherein, guide ring 8 ' can be by
Independent motor drives, and the motor that this independently drives can control power transmission shaft 7 ', the rotary speed of guide ring 8 ', direction of rotation
Deng.Here, guide ring 8 ' can be done under the drive of power transmission shaft 7 ' at the uniform velocity or speed change rotary motion, guide ring 8 ' can be along
One direction rotates, it is also possible to change direction of rotation as needed.
Dispersion impeller 11 ' includes at least two leaf dishes 111 ' be arrangeding in parallel, and leaf dish 111 ' can above be provided with a plurality of in symmetrical
The passage 112 ' of distribution, as needed, the size and shape of each leaf dish 111 ' could be arranged to identical, it is also possible to be set to
Differ, the relative leaf dish 111 ' of each two can be fixed by the support column 113 ' that multiple cross sections are circular or ellipse.Its
In, symmetrical passage 112 ' contributes to the balance of dispersion impeller 11 ' and effectively using for support column 113 ' so that fall
The interior material of different passages 112 ' and abrasive media can be clashed into, and help to produce fierceness between material and abrasive media
Collision.
The center of dispersion impeller 11 ' is provided with through hole 114 ', and dispersion impeller 11 ' is located at the bottom of guide ring 8 ' and grinding chamber 5
Between, the through hole 114 ' that power transmission shaft 7 ' passes through the center of dispersion impeller 11 '.
In the present embodiment, dispersion impeller 11 ' includes two leaf dishes 111 ', and leaf dish 111 ' is provided with four passages 112 ',
Center relative to leaf dish 111 ' is symmetrical arranged two-by-two, and support column 113 ' is cylinder.Two leaf dishes 111 ' thereon every two
Position between individual adjacent passage 112 ' is fixedly connected by four support columns 113 ', that is to say, that two leaf dishes 111 ' it
Between be fixedly connected by 16 support columns 113 '.Wherein, the arc contact surface of support column 113 ' is for material and abrasive media
Active force it is bigger, while increased material and abrasive media motion complexity, help to create fiercer collision
In addition, setting multiple stoppers 13 in the present embodiment, on the inwall of disengagement chamber so that existed by dielectric separator 3
The abrasive media thrown away under centrifugal action slows down rapidly and sinks in grinding chamber 5 and continues to participate in grinding.Grinding chamber 5 and separation
Spoiler 12 is provided between chamber 4, effectively to intercept between the fluid vortex that dielectric separator 3 and dispersion impeller 11 ' are formed
Interfere.
The medium stirred type wet grinding dispersal device provided by an embodiment of the invention described above, abrasive media and thing
Expect during by driving the guide ring for rotating by power transmission shaft, randomly to fall in the different zones of dispersion impeller, so that material
No longer it is the motion for doing regularization when passing through guide ring with abrasive media, helps to increase the collision frequency of material and abrasive media
With the severity of collision, such that it is able to improve grinding efficiency, circular grinding number of times is reduced.And, each leaf of dispersion impeller
Fixed by the support column that multiple cross sections are circular or ellipse between disk, relative to the structure of existing dispersion impeller, support
The cambered surface of post, has bigger active force for material and abrasive media, can be easier to promote the two rapid dispersion.Separately
Outward, the cambered surface of support column may be such that material and abrasive media have diversity with the impingement position of support column, can so drive
Abrasive media and material make more complicated motion, the collision of fierceness are helped to create, such that it is able to improve grinding efficiency.
Further, in the above-described embodiments, dielectric separator 3 also includes discharge the material not comprising abrasive media
Discharging opening 14, after by dielectric separator 3, material is separated with abrasive media, the material not comprising abrasive media passes through discharging opening
Outside 14 discharge disengagement chambers 4, then entered in grinding chamber 5 from charging aperture 1 by material-handling pump, realize circular grinding.
Further, axle envelope 2 is provided with the top of disengagement chamber 4, lower axle envelope 9 is provided with the bottom of grinding chamber 5, axle on this
Envelope 2 and lower axle envelope 9 use mechanical seal, so that the tightness of grinding chamber 5 is effectively ensured.
Wherein, dielectric separator 3 includes but is not limited to use centrifugation formula dielectric separator, screen mesh type separator and ring
Shape is spaced chip separator, and wherein, dielectric separator 3 can be, without motor-driven static separation device, or have independence
Motor-driven dynamic separator.
Specifically, being ground scattered process by the medium stirred type wet grinding dispersal device in above-described embodiment
It is as follows：
After material enters grinding chamber 5 through charging aperture 1, under the running at high speed of dispersion impeller 11 ', material and abrasive media from
The bottom of grinding chamber 5 rushes at the madial wall of grinding chamber 5, and under the stop of the periphery of lower grid plate 16, material and abrasive media are in lower grid
The periphery of plate 16, the AA areas between guide ring 8 ' and the madial wall of grinding chamber 5 form climbing power, along the bottom inside wall of grinding chamber 5
The gradient do ascending motion, eventually arrive at the upper cover plate 6 of the top of grinding chamber 5, the gradient of the periphery of top grating 15 is by material and grinding
Medium is guided to abrasive areas BB areas.
Material and abrasive media at abrasive areas BB areas, due to the madial wall of grinding chamber 5, top grating 15 and lower grid plate 16
The movement velocity of barrier effect, material and abrasive media is gradually reduced, and now, the material of abrasive media and larger specific gravity can be with
The material of the feed separation of crushing, abrasive media and larger specific gravity sinks down into dispersion impeller 11 ' because of Action of Gravity Field from guide ring 8 ',
Continue cycling through grinding.Wherein, because guide ring 8 ' is rotated by power transmission shaft 7 ', and partial material and grinding on guide ring 8 '
Medium, by blade to upthrow to abrasive areas BB areas, can therefore, it can to make the abrasive media in abrasive areas BB areas more intensely
Motion, so as to increase the fierce degree for clashing into number of times and clashing into.
In abrasive areas BB areas, for abrasive media and the material of larger specific gravity, due to the rotation of the high speed of dispersion impeller 11 '
Form siphon area so that the material and abrasive media of larger specific gravity can enter into dispersion impeller 11 ' quickly through guide ring 8 '
In, rotated by the high speed of dispersion impeller 11 ', the movement velocity of material and abrasive media is increased again, ground into circulation next time
Mill.
Due to can constantly provide material to grinding chamber 5 by charging aperture 1, the top grating 15 in abrasive areas BB areas is rested on
The material of the smaller proportion and lower grid plate 16 between can be by top grating 15 automatically into disengagement chamber CC areas.
By after top grating 15 and lower grid plate 16, entering into the material in disengagement chamber CC areas and the rotary impact power of abrasive media
Will reduce, the discharging opening 14 that the less material of proportion is included by dielectric separator 3 into dielectric separator simultaneously discharges grinding
Outside chamber 5, grinding or other steps are circulated via agitator and material-handling pump, and the larger material of proportion is in Action of Gravity Field
The lower inwall along disengagement chamber 4 falls in grinding chamber 5 and continues to participate in grinding.
After the completion of grinding, abrasive media and salvage stores are discharged by outlet 10.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
It is any be familiar with the people of the technology disclosed herein technical scope in, the change or replacement that can be readily occurred in should all be covered
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
1. a kind of medium stirred type wet grinding dispersal device, including grinding chamber, dielectric separator, guide ring, dispersion impeller and
Power transmission shaft, the grinding chamber is the airtight cavity of cylinder or cone, and the top of the grinding chamber is provided with disengagement chamber, is given an account of
Matter separator sets multiple stoppers, the grinding chamber and disengagement chamber in the disengagement chamber, on the inwall of the disengagement chamber
Between be provided with spoiler, it is characterised in that
The guide ring is located at grinding chamber middle part and is fixedly connected with the power transmission shaft, and the guide ring is by the power transmission shaft
It is rotated, the periphery of the guide ring is provided with a plurality of blade；
The dispersion impeller is located between the guide ring and the bottom of the grinding chamber, and the power transmission shaft is by the dispersion leaf
The center of wheel, the dispersion impeller includes at least two leaf dishes be arrangeding in parallel, and the leaf dish is provided with plurality of passages, each two
Leaf dish is fixed by the support column that multiple cross sections are circular or ellipse.
2. medium stirred type wet grinding dispersal device as claimed in claim 1, it is characterised in that a plurality of in the leaf dish
Passage is symmetric.
3. medium stirred type wet grinding dispersal device as claimed in claim 2, it is characterised in that the passage in the leaf dish
It is 4.
4. medium stirred type wet grinding dispersal device as claimed in claim 1 or 2, it is characterised in that the guide ring
Periphery is provided with the blade or spiral helicine blade of a plurality of turbine-like.
5. medium stirred type wet grinding dispersal device as claimed in claim 1, it is characterised in that the support column is cylinder
Body.
6. medium stirred type wet grinding dispersal device as claimed in claim 1, it is characterised in that the dielectric separator bag
Include the discharging opening for discharging the material not comprising abrasive media.
7. medium stirred type wet grinding dispersal device as claimed in claim 1, it is characterised in that the bottom of the grinding chamber
Lower axle envelope is provided with, the top of the disengagement chamber is provided with axle envelope.
8. medium stirred type wet grinding dispersal device as claimed in claim 1, it is characterised in that the top of the grinding chamber
Upper cover plate is provided with, the upper cover plate is provided with charging aperture, and the bottom of the grinding chamber is provided with outlet.
9. medium stirred type wet grinding dispersal device as claimed in claim 1, it is characterised in that the dielectric separator bag
Include centrifugation formula dielectric separator, screen mesh type separator and ring-like spacer chip separator.
10. medium stirred type wet grinding dispersal device as claimed in claim 1, it is characterised in that the dielectric separator
Including without motor-driven static separation device and the dynamic separator for thering is individual motor to drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310707221.8A CN104722367B (en) | 2013-12-20 | 2013-12-20 | A kind of medium stirred type wet grinding dispersal device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310707221.8A CN104722367B (en) | 2013-12-20 | 2013-12-20 | A kind of medium stirred type wet grinding dispersal device |
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| CN104722367A CN104722367A (en) | 2015-06-24 |
| CN104722367B true CN104722367B (en) | 2017-07-07 |
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| CN201310707221.8A Active CN104722367B (en) | 2013-12-20 | 2013-12-20 | A kind of medium stirred type wet grinding dispersal device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105880001B (en) * | 2016-05-09 | 2023-07-04 | 博亿(深圳)工业科技有限公司 | Stirring type grinding separator, grinding separation device and grinding device |
| CN106587031B (en) * | 2016-11-02 | 2019-01-04 | 成都新柯力化工科技有限公司 | A kind of device and graphene production method continuously preparing graphene |
| CN108435341B (en) * | 2018-04-26 | 2023-11-14 | 苏州世名科技股份有限公司 | Grinding device for producing particle dispersions |
| CN113828394B (en) * | 2021-09-03 | 2023-01-31 | 南京利卡维智能科技有限公司 | High-speed circulating feeding system of multi-shaft grinding machine |
| CN115475567A (en) * | 2022-09-14 | 2022-12-16 | 辽宁艾海滑石有限公司 | Production system and process of thin-sheet talcum powder |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5333804A (en) * | 1993-08-20 | 1994-08-02 | Premier Mill Corp. | Agitator mill |
| DE4432198A1 (en) * | 1994-09-09 | 1996-03-14 | Evv Vermoegensverwaltungs Gmbh | Agitator mill |
| CA2397157C (en) * | 2000-01-10 | 2008-12-09 | Premier Mill Corporation | Fine media mill with improved disc |
| ES2367265T3 (en) * | 2005-05-17 | 2011-10-31 | Ashizawa Finetech Ltd | MILL AGITATOR OF MEDIA OF CIRCULATION TYPE. |
| ES2356855T3 (en) * | 2007-08-17 | 2011-04-13 | Bühler AG | MILL AGITATOR. |
| JP5912324B2 (en) * | 2011-07-28 | 2016-04-27 | アシザワ・ファインテック株式会社 | Media stirring mill |
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Denomination of invention: Medium mixing type wet grinding dispersing device Effective date of registration: 20180611 Granted publication date: 20170707 Pledgee: Agricultural Bank of China Limited by Share Ltd Wuxi Huishan branch Pledgor: Wuxi Xinguang Powder Process Co., Ltd. Registration number: 2018990000441 |
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Effective date of registration: 20210901 Address after: Zhanbei Road, Qianzhou street, Huishan District, Wuxi City, Jiangsu Province Patentee after: Wuxi Taixian Powder Technology Co.,Ltd. Address before: 214181 No. 88 Qianshi Road, Qianzhou Town, Huishan District, Wuxi City, Jiangsu Province Patentee before: WUXI XINGUANG POWDER PROCESS Co.,Ltd. |
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